I bowled w/ 2 reasonably good lefties. Lower rev player w/ lower roll used Inferno straight up between 6 and 10, had a good look. When he missed missed right ball stayed in play for relatively easy spares or Brooklyns. Miss left was disaster, washouts or worse. More aggressive player stayed right up back of ball, used a small swing shot between 10 and 5 using Total NV and a Storm Jolt and bowled well. Miss left is bad, very late recovery and never made the pocket for washouts or worse. Miss inside was better for both. Good luck.